fix: Backslash issue when hard break space added

app/javascript/dashboard/helper/editorHelper.js

@@ -12,6 +12,23 @@ import {
 } from 'dashboard/constants/editor';
 import camelcaseKeys from 'camelcase-keys';
 
+/**
+ * Removes zero-width spaces and related invisible characters from text.
+ * Also handles backslash-newline patterns from hard breaks (Shift+Enter).
+ * These characters can interfere with signature detection and content handling.
+ *
+ * @param {string} text - The text to clean
+ * @returns {string} - The cleaned text without zero-width spaces
+ */
+export function removeZeroWidthSpaces(text) {
+  if (!text) return '';
+  return text
+    .replace(/\u200B\\\n/g, '\n') // Remove zero-width space + backslash + newline, keep newline
+    .replace(/\u200B\n/g, '\n') // Remove zero-width space + newline, keep newline
+    .replace(/\\\n/g, '\n') // Remove backslash before newline (hard break), keep newline
+    .replace(/\u200B/g, ''); // Remove standalone zero-width spaces
+}
+
 /**
  * Extract text from markdown, and remove all images, code blocks, links, headers, bold, italic, lists etc.
  * Links will be converted to text, and not removed.
@@ -46,6 +63,9 @@ export const SIGNATURE_DELIMITER = '--';
  */
 export function cleanSignature(signature) {
   try {
+    // Remove zero-width spaces before processing
+    signature = removeZeroWidthSpaces(signature);
+
     // remove any horizontal rule tokens
     signature = signature
       .replace(/^( *\* *){3,} *$/gm, '')
@@ -55,14 +75,17 @@ export function cleanSignature(signature) {
     const nodes = new MessageMarkdownTransformer(messageSchema).parse(
       signature
     );
-    return MessageMarkdownSerializer.serialize(nodes);
+    let result = MessageMarkdownSerializer.serialize(nodes);
+
+    // Remove zero-width spaces after serialization as well
+    return removeZeroWidthSpaces(result);
   } catch (e) {
     // eslint-disable-next-line no-console
     console.warn(e);
     Sentry.captureException(e);
     // The parser can break on some cases
     // for example, Token type `hr` not supported by Markdown parser
-    return signature;
+    return removeZeroWidthSpaces(signature);
   }
 }
 
@@ -85,7 +108,8 @@ function appendDelimiter(signature) {
  * @returns {number} - The index of the last occurrence of the signature in the body, or -1 if not found.
  */
 export function findSignatureInBody(body, signature) {
-  const trimmedBody = body.trimEnd();
+  // Remove zero-width spaces from body before comparison
+  const trimmedBody = removeZeroWidthSpaces(body).trimEnd();
   const cleanedSignature = cleanSignature(signature);
 
   // check if body ends with signature
@@ -116,6 +140,9 @@ export function supportsImageSignature(channelType) {
  * @returns {string} - The body with the signature appended.
  */
 export function appendSignature(body, signature, channelType) {
+  // Remove zero-width spaces from body before processing
+  const cleanedBody = removeZeroWidthSpaces(body);
+
   // For channels that don't support images, strip markdown formatting
   const shouldStripImages = channelType && !supportsImageSignature(channelType);
   const preparedSignature = shouldStripImages
@@ -123,11 +150,11 @@ export function appendSignature(body, signature, channelType) {
     : signature;
   const cleanedSignature = cleanSignature(preparedSignature);
   // if signature is already present, return body
-  if (findSignatureInBody(body, cleanedSignature) > -1) {
+  if (findSignatureInBody(cleanedBody, cleanedSignature) > -1) {
-    return body;
+    return cleanedBody;
   }
 
-  return `${body.trimEnd()}\n\n${appendDelimiter(cleanedSignature)}`;
+  return `${cleanedBody.trimEnd()}\n\n${appendDelimiter(cleanedSignature)}`;
 }
 
 /**
@@ -139,6 +166,9 @@ export function appendSignature(body, signature, channelType) {
  * @returns {string} - The body with the signature removed.
  */
 export function removeSignature(body, signature) {
+  // Remove zero-width spaces from body before processing
+  let newBody = removeZeroWidthSpaces(body);
+
   // Build list of signatures to try: original first, then stripped version
   // Always try both to handle cases where channelType is unknown or inbox is being removed
   const cleanedSignature = cleanSignature(signature);
@@ -150,13 +180,10 @@ export function removeSignature(body, signature) {
 
   // Find the first matching signature
   const signatureIndex = signaturesToTry.reduce(
-    (index, sig) => (index === -1 ? findSignatureInBody(body, sig) : index),
+    (index, sig) => (index === -1 ? findSignatureInBody(newBody, sig) : index),
     -1
   );
 
-  // no need to trim the ends here, because it will simply be removed in the next method
-  let newBody = body;
-
   // if signature is present, remove it and trim it
   // trimming will ensure any spaces or new lines before the signature are removed
   // This means we will have the delimiter at the end

package.json

@@ -33,7 +33,7 @@
   "dependencies": {
     "@breezystack/lamejs": "^1.2.7",
     "@chatwoot/ninja-keys": "1.2.3",
-    "@chatwoot/prosemirror-schema": "1.2.6",
+    "@chatwoot/prosemirror-schema": "1.2.9",
     "@chatwoot/utils": "^0.0.51",
     "@formkit/core": "^1.6.7",
     "@formkit/vue": "^1.6.7",

pnpm-lock.yaml

@@ -20,8 +20,8 @@ importers:
         specifier: 1.2.3
         version: 1.2.3
       '@chatwoot/prosemirror-schema':
-        specifier: 1.2.6
+        specifier: 1.2.9
-        version: 1.2.6
+        version: 1.2.9
       '@chatwoot/utils':
         specifier: ^0.0.51
         version: 0.0.51
@@ -421,8 +421,8 @@ packages:
   '@chatwoot/ninja-keys@1.2.3':
     resolution: {integrity: sha512-xM8d9P5ikDMZm2WbaCTk/TW5HFauylrU3cJ75fq5je6ixKwyhl/0kZbVN/vbbZN4+AUX/OaSIn6IJbtCgIF67g==}
 
-  '@chatwoot/prosemirror-schema@1.2.6':
+  '@chatwoot/prosemirror-schema@1.2.9':
-    resolution: {integrity: sha512-ej60kU3m/tP0VoGkOJhj0X+Mxt7fEX5DSEE4IibCZnTM4kMewkMxSYyPu0AXqaA4nKX1hTMrwcbv1t7gVQttWQ==}
+    resolution: {integrity: sha512-RTxjyoVTkvigt5wtInLD5apxErJwlsxepQBjB80QYmJD5x/RPNwMpnK1+xT+4yaNxVCnumNgIzSnFd4OpWaJgw==}
 
   '@chatwoot/utils@0.0.51':
     resolution: {integrity: sha512-WlEmWfOTzR7YZRUWzn5Wpm15/BRudpwqoNckph8TohyDbiim1CP4UZGa+qjajxTbNGLLhtKlm0Xl+X16+5Wceg==}
@@ -4862,7 +4862,7 @@ snapshots:
       hotkeys-js: 3.8.7
       lit: 2.2.6
 
-  '@chatwoot/prosemirror-schema@1.2.6':
+  '@chatwoot/prosemirror-schema@1.2.9':
     dependencies:
       markdown-it-sup: 2.0.0
       prosemirror-commands: 1.6.0